Any way to make the car lighter? I also would like to know where to get titanium screws for the car? Thanks for the help.

To lighten the car, use aluminium screws, they are half the weight of steel, Ti is only 2/3rds the weight of steel. I've used them everywhere except the forward attachment of the L plates. Beware that this is not a good idea if your track has solid boards, or if you have a habit of hitting things. The DB12R is strong for a lot of reasons, and the steel screws is one of them. HTH